USL JSD-60 Manual - Manual (Page 17)

Page 17
loop noise. The cable should be twisted pair with individual shields, even when driven by an unbalanced source.
The DB25F connector uses the THX® pin out as specified in the table in Appendix A.
Two Channel Analog Input
The JSD-60 has a stereo analog input (Non/Sync) on two RCA connectors. Connect these to an appropriate source
using RCA cables. Various stereo decode methods are available in the system. These allow direct driving of the left
and right speakers, adding a synthesized center channel, surround, and custom mix for all output channels.
Two Channel Digital Inputs
The JSD-60 has an S/PDIF input and a TOSLINK input.

S/PDIF Input. A stereo digital input on an RCA connector marked COAX. It is a standard S/PDIF (Sony Philips
Digital Interface) input. Connect to appropriate sources with 75 ohm coaxial cable with RCA connectors on
each end. As with the other stereo inputs, various decode methods are available.

TOSLINK Input. A TOSLINK optical digital stereo input is included on the JSD-60. Connect this input to an
appropriate source with a standard TOSLINK cable. As with other stereo inputs, various decode methods are
available.
Single Channel Audio Inputs
The JSD-60 has a Public Address (PA) and Real Time Analyzer (RTA) microphone input.

PA/RTA Microphone Input. Plug a PA microphone in to the combination XLR / ¼” stero (TRS) phone jack. The
microphone input may be configured to drive the main or the surround speakers. In addition, the PA
microphone input can drive the RTA for room equalization. The jack is a combination XLR and ¼” TRS (stereo)
connector. The XLR input is balanced. The 1/4 inch connector can be used either balanced or unbalanced.
Phantom power can drive both sides of a balanced line with +12V through 1k on each line. It can also drive an
unbalanced input (typically on the 1/4 inch connector) with +9V through 1.8k. When using unbalanced
phantom power, the signal is on the tip and the phantom power voltage is on the ring. The phantom power is
designed to provide low current bias to electret microphones. Condensor microphone preamps may draw
more current than the phantom power can supply.
7.6
Analog Audio Output Connections
The JSD-60 provides eight main channel outputs plus HI and VI-N outputs. All outputs are balanced and may drive
balanced or unbalanced loads. When driving unbalanced loads, run two conductor shielded cable and connect the
“ – ” terminal of the JSD-60 output to the low side of the unbalanced load at the load instead of at the JSD-60 to
minimize ground loop noise.
Main Audio Outputs
The eight channel analog output connector provides eight balanced analog outputs. These are full-range outputs if
no crossover board is installed. If a crossover board is installed, this connector provides the low band outputs of
the screen channels, the full range surround channels, and the LFE1 output. The crossover output connector
provides three crossover high band outputs plus the LFE2 output. On systems with the crossover, four DIP switches
set the crossover frequency for the bypass passive crossover. If the crossover is not to be used, set all the switches
to off. Adjust the low trim pot to yield the desired bypass output level. Remember that the front panel fader also
affects the output level when in bypass. For more information on bypass operation with crossovers, see Section
7.7.1. The connector pin outs are listed in Appendix A
HI/VI-N Outputs
The JSD-60 has balanced HI and VI-N outputs that can drive balanced or unbalanced loads. As with other outputs,
the use of twisted pair shielded cable is suggested whether the load is balanced or unbalanced. When driving an
unbalanced load, connect the “ – ” output of the JSD-60 to low side of the unbalanced input at the destination end
of the cable to minimize ground loop noise. The source of audio to drive the HI and VI-N outputs is configurable on